A shorter story about integrity (about 130-150 words, preferably no more than 170 words)

Once, the wife of Zengzi (a student of Confucius) was going out, and her son was crying and wanted to go with her. Zengzi's wife coaxed him and said: "Wait for me at home, and I will kill pigs and stew meat for you when I come back." The child believed it. When his wife came back, she saw Zeng Zi sharpening his knife and preparing to kill a pig. She quickly stopped her and said, "I said killing pigs was to coax the children." Zengzi said: If the mother does not keep her word, her children will break their promises. Zengzi's wife heard this and killed the pig with Zengzi.

During the Warring States Period, Shang Yang wanted to reform and become stronger. Shang Yang thought: How can I make people believe that my reform is true? He erected a three-foot-high log at the south gate of the capital and said that whoever could carry it to the north gate would be rewarded with ten taels of gold. But no one believes it, no one carries it. Shang Yang increased the reward to fifty taels. Finally one day, a strong man carried the wood to the north gate. Shang Yang rewarded him with fifty taels of gold on the spot. The common people said: Shang Yang is true to his word, and his orders must be carried out. The success of Shang Yang's reform laid the foundation for Qin's prosperity.